Home / 21,286.36-29,375.24-11,855.28

Finding the Fourth Proportional to 21,286.36, 29,375.24 and 11,855.28

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Solution

The fourth proportional to 21,286.36, 29,375.24 and 11,855.28 is: 16,360.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.36 : 29,375.24 = 11,855.28 : x
  2. Step 2: Convert to fraction form
    21,286.36/29,375.24 = 11,855.28/x
  3. Step 3: Cross multiply
    21,286.36x = 29,375.24 × 11,855.28
  4. Step 4: Simplify right side
    21,286.36x = 348,251,695.27
  5. Step 5: Solve for x
    x = 348,251,695.27/21,286.36
  6. Step 6: Final answer
    x = 16,360.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.